In my understanding, while talking about future whether to use "would" or "will" depends on our perception and subjective.
If you are confident about something you can use 'will' instead of 'would' and, use 'would' if you are less confident about something( while talking about future).
- Egypt has decided to build a new city near Cairo, that city will create more jobs
( It means we are sure that city is going to be constructed and at the same moment ,it is going to create more jobs-100% confident that it will happen).
- Egypt has decided to build a new city near Cairo, that city would create more jobs
( Not sure about the job creation because of unreliable government , and happens only if everything goes well- it means, only if government makes city and creates more job).
It would be great if someone could help me on above regards, I am totally going insane on this 'would' and 'will' confusion.